/Engine/Source/Runtime/Slate/Public/Framework/Application/SlateApplication.h
Checks whether the specified widget has any descendants which are currently focused.
true if any descendants are focused, false otherwise.
virtual bool HasFocusedDescendants ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< const [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > & Widget ) const